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10 Best diamond testers for lab grown diamonds - March 2026

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Last Updated: 03-30-2026

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1

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Cultj Diamond Combo Tester II - Professional Moissanite & HPHT Type Lab-Grown Diamond Tester

Cultj Diamond Combo Tester II - Professional Moissanite & HPHT Type Lab-Grown Diamond Tester

cultj

9.8

9.8

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2

Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)

Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)

Hqdz

9.6

9.6

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3

bestBest value
Smart Pro MAX Diamond Tester - 5-in-1 Thermal & Optical Probe for Moissanite, Lab Diamond & CZ Detection (0.02ct+)

Smart Pro MAX Diamond Tester - 5-in-1 Thermal & Optical Probe for Moissanite, Lab Diamond & CZ Detection (0.02ct+)

Generic

9.5

9.5

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4

HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)

HMKIS Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)

HMKIS

9.2

9.2

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5

Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

Presidium

9.1

9.1

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6

HMJOY Diamond Tester, High Accuracy Simple Operation Jewelry Diamond Tester＋ 60X Mini LED Magnifying, New Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter

HMJOY Diamond Tester, High Accuracy Simple Operation Jewelry Diamond Tester＋ 60X Mini LED Magnifying, New Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter

HMJOY

8.8

8.8

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7

Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional Diamond Selector for Jeweler Novice and Expert,Thermal Conductivity Meter (Diamond Tester)

Diamond Tester High Accuracy Diamond Tester Pen,Environmental Protection 9V Battery,Professional Diamond Selector for Jeweler Novice and Expert,Thermal Conductivity Meter (Diamond Tester)

Hqdz-td

8.6

8.6

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8

SmartPro Screen I Diamond Tester CVD HTHP Type lla Lab Created

SmartPro Screen I Diamond Tester CVD HTHP Type lla Lab Created

SmartPro

8.4

8.4

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9

Diamond Tester Jewelry Gem Stone Tester Moissanite Tester Professional 2pt Jewel Stone Combo Tester Kit for Diamond, Moissanite, Metal and Gemstone Selection - High Accuracy Jeweler Test Meter Device

Diamond Tester Jewelry Gem Stone Tester Moissanite Tester Professional 2pt Jewel Stone Combo Tester Kit for Diamond, Moissanite, Metal and Gemstone Selection - High Accuracy Jeweler Test Meter Device

TEKCOPLUS

8.2

8.2

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10

Presidium Diamond Mate C (PDMT-C) Diamond Tester | Professional Portable Diamond Authenticity Testing Tool | Diamond and Jewelry Thermal Conductivity Tester with Rechargeable Battery and AC Adapter

Presidium Diamond Mate C (PDMT-C) Diamond Tester | Professional Portable Diamond Authenticity Testing Tool | Diamond and Jewelry Thermal Conductivity Tester with Rechargeable Battery and AC Adapter

Presidium

8.1

8.1

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